JPH03254999A - Holder with curved back part and production thereof - Google Patents

Abstract

PURPOSE:To obtain high-quality round back goods having a higher-grade appearance in the arrangement in a bookshelf and a favorably fitting feeling in carrying and never deforming by a method wherein a back part made of a thermoplastic resin is molded to be curved outward, and the inner surface of the back part is integrally molded with curved reinforcing ribs in the width direction at a plurality of points in the longitudinal direction. CONSTITUTION:A holder consists of a top cover 1, a back 2, and rear cover 3. The back 2 is molded to be curved outward in what is called round back form. A material 6 consisting of the top cover 1, the back 2, and the rear cover 3 is made of a thermoplastic resin, such as polypropylene and vinyl chloride. A reinforcing rib material 7 is made of a thermoplastic resin harder than said resin. In the production, the material 6 and the reinforcing rib material 7 are disposed on a lower mold 8 having a curved recess 8a and heated and pressurized by a hone 9 of an ultrasonic welder having a curved end face 10 and a molding groove 11. In this manner, the reinforcing rib material 7 is melted at the edge of the molding groove 11 and shaped into a round back form within the curved recess 8a of the lower mold. This reinforcing rib material 7 of a predetermined dimension is integrally molded with the inner surface of the back.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention has a front cover, spine, and back cover, and can store various sheet-like items such as documents, document storage bags, album mounts, postcards, etc. The present invention relates to a recording product having a curved back and a method for manufacturing the same.

[Prior Art] Various recording supplies are provided for recording and storing various sheet-like objects such as documents, and each have a front cover, a spine, and a back cover, and are provided with binding fittings.

By the way, the back of such recording supplies is usually a flat surface.

[Problems to be Solved by the Invention] Recording supplies with flat backs have the disadvantage that they lack a good fit when carried, and even if careful attention is paid to the packaging, when placed on a bookshelf, they lack a high-quality feel. I hate it. Therefore, it is desirable to have a recording product whose back is curved outward (hereinafter referred to as a round back product), but simply forming a curved back does not stabilize the backlight condition and may change over time. There was a problem with the quality of the molding, which lacked beauty.

Therefore, it is an object of the present invention to provide a backlighting product with no problem in quality-1 and a method for manufacturing the same.

[Means for Solving the Problems] In order to achieve the object -1-, the present invention is configured as follows.

In other words, in a recording product that has a front cover, a spine, and a back cover, and is capable of storing sheet-like objects such as documents inside, the whole or the back is made of thermoplastic resin, and the back made of thermoplastic resin is curved toward the outside. This recording product has a curved back part that is molded into a shape, and has curved reinforcing ribs made of thermoplastic resin integrated in the width direction at a plurality of locations on the inner surface of the back part in the longitudinal direction.

When attaching binding hardware to such recording materials, ring-shaped binding tools can be attached to the inside of the spine, while other binding tools can be attached to the inside of the front cover or back cover as before. good.

Alternatively, adhesive resin may be fixed to the inner surface of the curved back portion, and the sheet-like object may be fixedly stored at the end surface thereof.

The sheet-like object is not limited to documents, but can include various sheet-like objects that require storage, such as a synthetic resin sheet having a document storage section, an album mount, and postcards.

Moreover, such recording supplies can be easily manufactured by the following method.

The front material constituting the front cover, spine, and back cover is placed on a lower mold having a curved concave portion, and a plurality of reinforcing rib materials lining the inner surface of the back portion in the width direction are positioned and provided on the front surface to form a curved end surface. This is a method of integral molding by heating and pressing with a horn of an ultrasonic welder or a contact of a high frequency welder, which has molding grooves for reinforcing ribs formed on the end face. That is, the back part is molded into the desired round shape by the curved concave part of the lower mold, and the reinforcing rib material is cut to an appropriate size at both ends of the molding groove and integrated with the inner surface of the back part, resulting in a high-quality back light product. .

Another method is to curve the back of the front cover, spine, and back cover to the outside in advance.
In the lower mold having a curved recess in which this curved back part is installed, a "2" mark is installed, and a plurality of reinforcing ribs lining the inner surface of the back part in the width direction are positioned and provided at the front face 1-, and the curved end face and It is also possible to perform integral molding by heating and pressing with a horn of an ultrasonic welder or a contact of a high-frequency welder, which has molding grooves for reinforcing ribs formed on the end face.

[Function] Since the back part of the backlight product of the present invention is made of thermoplastic resin and is integrally molded into a backlight shape with reinforcing ribs integrated, it is possible to provide a high quality backlight product with a rich feel. obtain.

Further, according to the manufacturing method of the present invention, the back part is molded under heat and pressure by a lower die having a curved concave portion and the curved end surface of the horn of an ultrasonic welder or the contact of a high frequency welder, and the reinforcing ribs are simultaneously integrated into the inner surface of the back part. Therefore, it is possible to easily manufacture backlighting products of a desired shape with good quality.

[Embodiment] FIG. 1 is a partial perspective view showing an embodiment of the backlight article according to this invention, and shows a recording article consisting of a cover 1, a spine 2, and a back cover 3. As shown in the figure, the back portion 2 is formed into a curved shape on the outer surface side, and is formed into a so-called backlight shape. Reference numeral 4 denotes curved reinforcing ribs made of thermoplastic resin that are integrally molded at a plurality of locations in the longitudinal direction of the inner surface of the back portion, and the backlight condition of the back portion 2 is stably ensured by these reinforcing ribs. In addition,
Reference numeral 5 denotes a hinge portion formed between the back and the front and back covers.

Figure 2 shows an example of the manufacturing method for such a backlit article, and 6 is a cover material consisting of a cover 1, spine 2, and back cover 3, which is made of thermoplastic resin such as polypropylene or vinyl chloride. . 7 is a reinforcing rib shrine made of thermoplastic resin, which is made of a harder resin than the surface material. Reference numeral 8 designates a lower mold on which the surface material 6 and the reinforcing rib strip 7 are placed, and a curved recess 8a for obtaining a desired backlight condition. Reference numeral 9 denotes a horn of an ultrasonic welder having a curved end surface 10 and a reinforcing rib molding groove 11 formed on the curved end surface 10.

That is, this manufacturing method involves placing the face material 6 and reinforcing ribs 7 on a lower mold 8'' having a curved recess 8a, and heating and pressurizing it with the horn 9 of an ultrasonic welder having a curved end surface 10 and a molding groove 11. As a result, the reinforcing rib 7 is fused at the edge of the molding groove 11 and the curved recess 8 of the lower mold is cut.
A reinforcing rib strip 7, which is molded in a backlit state and has a predetermined size, is integrated into the inner surface of the back part.

In the above manufacturing method, the process of curving the back, fusing the reinforcing ribs, and integrating are performed in one shot. An ultrasonic welder having the same configuration as in 1- above, in which a face material is installed on a lower mold having a recessed part, and a plurality of reinforcing ribs lining the inner surface of the back part in the width direction are installed across the curved recessed part. A method of integrally molding the horn can also be adopted.

In any of the manufacturing methods, the hinge portion 5 can be manufactured by either post-processing or pre-processing.

In the illustrated example, the reinforcing ribs are placed directly on the surface material, but they are located in the space between the surface material and the horn of the ultrasonic welder or the contact of the high-frequency welder.
It's okay to get J. In this case, for example, a guide body for holding the reinforcing ribs in a positional relationship corresponding to the forming grooves may be provided, and the rib holes may be in the form of a long line, and the ribs may be placed in a position corresponding to each forming groove. It can also be configured to feed from the force direction.

[Effects of the Invention] As described in 1-1 below, the recording product according to the present invention has a back light shape in which the back curves outward, and when arranged on a bookshelf,
1- Has a good feel. Furthermore, even when carried, a favorable fit can be obtained because of the backlight. Furthermore, since the binding metal fittings can be fixed to the curved back, wasted space is eliminated, and storage efficiency is improved accordingly. Furthermore, since the backlighting state is made by molding thermoplastic resin and has integrally molded reinforcing ribs, there is no risk of deformation during manufacturing and use, making it possible to provide high-quality backlighting products. It is.

Further, according to the manufacturing method according to the present invention, a desired backlighting product can be easily manufactured with high quality.

[Brief explanation of drawings]

FIG. 1 is a partial perspective view showing an embodiment of a recording product having a curved back according to the present invention, and FIG. 2 is a schematic perspective view showing an embodiment of the manufacturing method according to the present invention. 1...Cover 2...Back 3
······Back cover

Claims (6)

[Claims] (1) In a recording product that has a cover, a spine, and a back cover and can store sheet-like objects such as documents inside, the back made of thermoplastic resin is molded into a curved shape outward, and the inner surface of this back A recording product having a curved back in which curved reinforcing ribs made of thermoplastic resin are integrated in the width direction at multiple locations in the longitudinal direction. (2) The recording product according to claim 1, wherein a binding fitting is fixed to the curved back. (3) The recording product according to claim 1, wherein an adhesive resin capable of fixing a sheet-like object at an end surface is attached to the inner surface of the curved back. (4) The recording product according to claim 1, wherein a sheet-like object having a storage section on the curved back is stored and held. (5) The front material constituting the front cover, spine, and back cover is placed on a lower mold having a curved recess, and multiple reinforcing ribs that line the inner surface of the back in the width direction are positioned and provided on the front material. , A method for producing a recording product having a curved back, characterized by integral molding by heating and pressing with a horn of an ultrasonic welder or a contact of a high-frequency welder, which has a curved end face and a molding groove for reinforcing ribs formed on this end face. . (6) The back of the front cover, spine, and back cover is curved outward in advance, and the back is placed in a lower mold having a curved recess in which the curved back is placed. A plurality of reinforcing ribs lining in the width direction are positioned and provided on the surface material, and are heated by the horn of an ultrasonic welder or the contact of a high-frequency welder, which has a curved end face and a molding groove for the reinforcing ribs formed on this end face. A method for producing a recording product having a curved back, which is characterized by integral molding by pressing.